Philadelphia Eagles running back LeSean McCoy got into a nasty spat over Twitter with the mother of his young son on Saturday that including mudslinging from both parties.

It’s difficult to pinpoint exactly what sparked the hate-filled exchange, but it seems to have been prompted by McCoy’s baby mama — a woman by the name of Steph — correcting McCoy in a tweet.

McCoy tweeted Saturday to brag about his vacation in Puerto Rico, and misspelled it “vocation.” Steph, who goes by Angelface0330 on Twitter, corrected him, leading to multiple tweets sent back-and-forth between the two.

Here’s Steph correcting him to start the issue (h/t to Black Sports Online for pointing out the exchange):